Charger base



FIG. 1 is a top perspective view of a charger base;

FIG. 2 is a bottom perspective view of the charger base;

FIG. 3 is a front view of the charger base;

FIG. 4 is a rear view of the charger base;

FIG. 5 is a right side view of the charger base;

FIG. 6 is a left side view of the charger base;

FIG. 7 is a top view of the charger base; and,

FIG. 8 is a bottom view of the charger base.

The broken lines shown in the drawings of a charger base are for illustrative purposes only and form no part of the claimed design. 

CLAIM The ornamental design for a charger base, as shown and described. 